Analysis of Normal Human Eye with Different Age Groups using Infrared Images

  • Authors:

  • Rajendra Acharya U;E. Y. Ng;Gerk Chang Yee;Tan Jian Hua;Manjunath Kagathi

  • Affiliations:

  • School of Engineering, Division of ECE, Ngee Ann Polytechnic, Singapore, Singapore 599489;School of Mechanical and Aerospace Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore 639798;School of Engineering, Division of ECE, Ngee Ann Polytechnic, Singapore, Singapore 599489;School of Engineering, Division of ECE, Ngee Ann Polytechnic, Singapore, Singapore 599489;Eye Centre, National University Hospital, Singapore, Singapore

  • Venue:
  • Journal of Medical Systems
  • Year:
  • 2009

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Abstract

The human body temperature is a good health indicator. All objects emit thermal radiation as a function temperature and wavelength for all wavelengths. The wavelength of infrared rays lies between visible and microwave radiations ranging between 700 nm to 0.1 mm. Infrared (IR) imaging is relatively inexpensive, noninvasive and harmless. Nowadays, it is widely used in the medical field for diagnosis. In this work, we have applied image processing techniques on the IR images of the eye for the analysis of the ocular surface temperature (OST) of the normal subjects of three categories (young, middle and old ages). In our study, 67 IR normal images were analyzed. Two parameters, average ocular temperature and the temperature deviation were proposed to study the variability of OST in different normal category subjects. Our study shows that, the two parameters proposed, show distinct ranges for different groups with `p' values less than 0.05.